{"id":"CVE-2021-29969","aliases":["ALPINE-CVE-2021-29969","DEBIAN-CVE-2021-29969","DLA-2711-1","DSA-4940-1","EUVD-2021-16428","GHSA-ggp3-c9px-5c4p","MGASA-2021-0355","RHSA-2021:2881","RHSA-2021:2882","RHSA-2021:2883","RHSA-2021:2914","RLSA-2021:2883","SUSE-SU-2021:2458-1","UBUNTU-CVE-2021-29969","USN-5058-1","openSUSE-SU-2021:1091-1","openSUSE-SU-2021:2458-1","openSUSE-SU-2024:10601-1"],"status":"published","title":"If Thunderbird was configured to use STARTTLS for an IMAP connection, and an attacker injected...","description":"If Thunderbird was configured to use STARTTLS for an IMAP connection, and an attacker injected IMAP server responses prior to the completion of the STARTTLS handshake, then Thunderbird didn't ignore the injected data. This could have resulted in Thunderbird showing incorrect information, for example the attacker could have tricked Thunderbird to show folders that didn't exist on the IMAP server. This vulnerability affects Thunderbird \u003c 78.12.","severity":{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.012,"percentile":0.68599,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-552"],"published":"2021-07-16T08:25:31Z","modified":"2026-11-03T06:32:32Z","fixes":[{"ecosystem":"Alpine:v3.16","package":"thunderbird","fixed_in":["91.3.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"thunderbird","fixed_in":["91.3.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"thunderbird","fixed_in":["91.3.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"thunderbird","fixed_in":["91.3.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"thunderbird","fixed_in":["91.3.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"thunderbird","fixed_in":["91.3.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"thunderbird","fixed_in":["91.3.2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"thunderbird","fixed_in":["91.3.2-r0"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"thunderbird","fixed_in":["1:78.12.0-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"thunderbird","fixed_in":["1:78.12.0-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"thunderbird","fixed_in":["1:78.12.0-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:18.04:LTS","package":"thunderbird","fixed_in":["1:78.13.0+build1-0ubuntu0.18.04.1"],"sources":["osv"]},{"ecosystem":"Ubuntu:20.04:LTS","package":"thunderbird","fixed_in":["1:78.13.0+build1-0ubuntu0.20.04.2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.16","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"91.3.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.17","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"91.3.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.18","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"91.3.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.19","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"91.3.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.20","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"91.3.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.21","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"91.3.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.22","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"91.3.2-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.23","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"91.3.2-r0"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:78.12.0-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:78.12.0-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:78.12.0-1"}]}]},{"source":"osv","ecosystem":"Debian:9","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:78.12.0-1~deb9u1"}]}],"versions":["1.5-4","1.5.0.2-1","1.5.0.2-2","1.5.0.2-3","1.5.0.4-1","1.5.0.4-2","1.5.0.4-3","1.5.0.5-1","1.5.0.7-1","1.5.0.7-2","1:52.4.0-1","1:52.4.0-1~deb7u1","1:52.4.0-1~deb8u1","1:52.4.0-1~deb9u1","1:52.4.0-2~exp1","1:52.5.0-1","1:52.5.0-1~deb7u1","1:52.5.0-1~deb8u1","1:52.5.0-1~deb9u1","1:52.5.2-1","1:52.5.2-1~deb7u1","1:52.5.2-2","1:52.5.2-2~deb8u1","1:52.5.2-2~deb9u1","1:52.6.0-1","1:52.6.0-1+alpha.1","1:52.6.0-1+alpha.2","1:52.6.0-1~deb7u1","1:52.6.0-1~deb8u1","1:52.6.0-1~deb9u1","1:52.7.0-1","1:52.7.0-1~deb7u1","1:52.7.0-1~deb8u1","1:52.7.0-1~deb9u1","1:52.8.0-1","1:52.8.0-1~deb7u1","1:52.8.0-1~deb8u1","1:52.8.0-1~deb9u1","1:52.9.0-1","1:52.9.1-1","1:52.9.1-1~deb8u1","1:52.9.1-1~deb9u1","1:58.0~b3-1","1:60.0-1","1:60.0-2","1:60.0-2~deb9u1","1:60.0-3","1:60.0-3~deb9u1","1:60.0~b10-1","1:60.0~b2-1","1:60.0~b3-1","1:60.0~b4-1","1:60.0~b5-1","1:60.0~b6-1","1:60.0~b9-1","1:60.0~b9-2","1:60.2.1-1","1:60.2.1-2~deb9u1","1:60.3.0-1","1:60.3.0-1~deb8u1","1:60.3.0-1~deb9u1","1:60.3.1-1","1:60.4.0-1","1:60.4.0-1~deb8u1","1:60.4.0-1~deb9u1","1:60.5.0-1","1:60.5.0-2","1:60.5.0-3","1:60.5.1-1","1:60.5.1-1~deb8u1","1:60.5.1-1~deb9u1","1:60.6.1-1","1:60.6.1-1~deb8u1","1:60.6.1-1~deb9u1","1:60.7.0-1","1:60.7.0-1~deb8u1","1:60.7.0-1~deb9u1","1:60.7.1-1","1:60.7.1-1~deb8u1","1:60.7.1-1~deb9u1","1:60.7.2-1","1:60.7.2-1~deb8u1","1:60.7.2-1~deb9u1","1:60.8.0-1","1:60.8.0-1~deb10u1","1:60.8.0-1~deb8u1","1:60.8.0-1~deb9u1"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security/cve/CVE-2020-6814","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-6819","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-6820","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-6821","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-6822","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-6825","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-6831","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-23953","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-23954","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-23960","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-23961","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-23964","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-23968","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-23969","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-23973","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-23978","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-23981","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-23982","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-23984","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-23987","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-23991","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-23993","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-23994","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-23995","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-23998","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-23999","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-24002","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-29945","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-29946","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-29948","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-29956","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-29957","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-29964","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-29967","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-29980","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-29984","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-29985","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-29986","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-29988","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-29989","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-29991","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-38492","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-38495","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2021-29969","description":"If Thunderbird was configured to use STARTTLS for an IMAP connection, and an attacker injected IMAP server responses prior to the completion of the STARTTLS handshake, then Thunderbird didn't ignore the injected data. This could have resulted in Thunderbird showing incorrect information, for example the attacker could have tricked Thunderbird to show folders that didn't exist on the IMAP server. This vulnerability affects Thunderbird \u003c 78.12.","status":"published","published":"2021-08-05T19:46:42Z","modified":"2024-08-03T22:24:57.484Z","updated_at":"2026-11-02T14:33:06.658806Z"}],"euvd":[{"id":"EUVD-2021-16428","description":"If Thunderbird was configured to use STARTTLS for an IMAP connection, and an attacker injected IMAP server responses prior to the completion of the STARTTLS handshake, then Thunderbird didn't ignore the injected data. This could have resulted in Thunderbird showing incorrect information, for example the attacker could have tricked Thunderbird to show folders that didn't exist on the IMAP server. This vulnerability affects Thunderbird \u003c 78.12.","status":"published","published":"2021-08-05T19:46:42Z","modified":"2024-08-03T22:24:57Z","updated_at":"2026-11-03T03:24:43.413555Z"}],"ghsa":[{"id":"GHSA-ggp3-c9px-5c4p","title":"If Thunderbird was configured to use STARTTLS for an IMAP connection, and an attacker injected...","description":"If Thunderbird was configured to use STARTTLS for an IMAP connection, and an attacker injected IMAP server responses prior to the completion of the STARTTLS handshake, then Thunderbird didn't ignore the injected data. This could have resulted in Thunderbird showing incorrect information, for example the attacker could have tricked Thunderbird to show folders that didn't exist on the IMAP server. This vulnerability affects Thunderbird \u003c 78.12.","status":"published","published":"2022-05-24T19:10:12Z","modified":"2023-01-30T05:00:59Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-552"],"updated_at":"2026-11-02T14:46:19.140142Z"}],"nvd":[{"id":"CVE-2021-29969","description":"If Thunderbird was configured to use STARTTLS for an IMAP connection, and an attacker injected IMAP server responses prior to the completion of the STARTTLS handshake, then Thunderbird didn't ignore the injected data. This could have resulted in Thunderbird showing incorrect information, for example the attacker could have tricked Thunderbird to show folders that didn't exist on the IMAP server. This vulnerability affects Thunderbird \u003c 78.12.","status":"published","published":"2021-08-05T20:15:08.5Z","modified":"2026-06-17T03:48:31.79Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-552"],"updated_at":"2026-11-02T14:06:56.562207Z"}],"osv":[{"id":"ALPINE-CVE-2021-29969","description":"If Thunderbird was configured to use STARTTLS for an IMAP connection, and an attacker injected IMAP server responses prior to the completion of the STARTTLS handshake, then Thunderbird didn't ignore the injected data. This could have resulted in Thunderbird showing incorrect information, for example the attacker could have tricked Thunderbird to show folders that didn't exist on the IMAP server. This vulnerability affects Thunderbird \u003c 78.12.","status":"published","published":"2021-08-05T20:15:08.5Z","modified":"2026-11-03T06:32:32.417725744Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-03T07:17:41.158523Z"},{"id":"CVE-2021-29969","description":"If Thunderbird was configured to use STARTTLS for an IMAP connection, and an attacker injected IMAP server responses prior to the completion of the STARTTLS handshake, then Thunderbird didn't ignore the injected data. This could have resulted in Thunderbird showing incorrect information, for example the attacker could have tricked Thunderbird to show folders that didn't exist on the IMAP server. This vulnerability affects Thunderbird \u003c 78.12.","status":"published","published":"2021-08-05T20:15:08.5Z","modified":"2026-04-16T04:39:53.993741967Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:19.483607Z"},{"id":"DEBIAN-CVE-2021-29969","description":"If Thunderbird was configured to use STARTTLS for an IMAP connection, and an attacker injected IMAP server responses prior to the completion of the STARTTLS handshake, then Thunderbird didn't ignore the injected data. This could have resulted in Thunderbird showing incorrect information, for example the attacker could have tricked Thunderbird to show folders that didn't exist on the IMAP server. This vulnerability affects Thunderbird \u003c 78.12.","status":"published","published":"2021-08-05T20:15:08.5Z","modified":"2026-10-23T18:03:12.688069718Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:34.94143Z"},{"id":"RHSA-2021:2881","title":"Red Hat Security Advisory: thunderbird security update","status":"published","published":"2024-09-16T06:10:56Z","modified":"2026-06-26T10:55:15Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:08.619234Z"},{"id":"RHSA-2021:2882","title":"Red Hat Security Advisory: thunderbird security update","status":"published","published":"2024-09-16T06:10:50Z","modified":"2025-11-22T12:23:07Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:08.619234Z"},{"id":"RHSA-2021:2883","title":"Red Hat Security Advisory: thunderbird security update","status":"published","published":"2024-09-16T06:10:44Z","modified":"2025-11-22T12:23:07Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:08.619234Z"},{"id":"RHSA-2021:2914","title":"Red Hat Security Advisory: thunderbird security update","status":"published","published":"2024-09-16T06:11:04Z","modified":"2025-11-22T12:23:08Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:08.619234Z"},{"id":"RLSA-2021:2883","title":"Important: thunderbird security update","description":"Mozilla Thunderbird is a standalone mail and newsgroup client.\n\nThis update upgrades Thunderbird to version 78.12.0.\n\nSecurity Fix(es):\n\n* Mozilla: IMAP server responses sent by a MITM prior to STARTTLS could be processed (CVE-2021-29969)\n\n* Mozilla: Use-after-free in accessibility features of a document (CVE-2021-29970)\n\n* Mozilla: Memory safety bugs fixed in Firefox 90 and Firefox ESR 78.12 (CVE-2021-29976)\n\n* chromium-browser: Out of bounds write in ANGLE (CVE-2021-30547)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","status":"published","published":"2021-07-26T10:57:37Z","modified":"2026-02-04T13:00:07.894148Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:23.969672Z"},{"id":"UBUNTU-CVE-2021-29969","description":"If Thunderbird was configured to use STARTTLS for an IMAP connection, and an attacker injected IMAP server responses prior to the completion of the STARTTLS handshake, then Thunderbird didn't ignore the injected data. This could have resulted in Thunderbird showing incorrect information, for example the attacker could have tricked Thunderbird to show folders that didn't exist on the IMAP server. This vulnerability affects Thunderbird \u003c 78.12.","status":"published","published":"2021-08-05T20:15:00Z","modified":"2026-04-22T12:51:04.552761Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:26.779273Z"},{"id":"DLA-2711-1","title":"thunderbird - security update","status":"published","published":"2021-07-19T00:00:00Z","modified":"2026-03-09T01:21:48.855635Z","updated_at":"2026-11-02T15:46:10.712745Z"},{"id":"DSA-4940-1","title":"thunderbird - security update","status":"published","published":"2021-07-18T00:00:00Z","modified":"2026-03-09T02:10:49.369916Z","updated_at":"2026-11-02T15:46:17.19998Z"},{"id":"MGASA-2021-0355","title":"Updated thunderbird packages fix security vulnerabilities","description":"IMAP server responses sent by a MITM prior to STARTTLS could be processed\n(CVE-2021-29969).\n\nUse-after-free in accessibility features of a document (CVE-2021-29970).\n\nOut of bounds write in ANGLE (CVE-2021-30547).\n\nMemory safety bugs fixed in Thunderbird 78.12 (CVE-2021-29976).\n","status":"published","published":"2021-07-16T08:25:31Z","modified":"2026-04-16T04:40:36.538913391Z","updated_at":"2026-11-02T15:49:41.509337Z"},{"id":"openSUSE-SU-2021:1091-1","title":"Security update for MozillaThunderbird","description":"This update for MozillaThunderbird fixes the following issues:\n\nMozilla Thunderbird 78.12\n\n  * fixed: Sending an email containing HTML links with spaces in\n    the URL sometimes resulted in broken links\n  * fixed: Folder Pane display theme fixes for macOS\n  * fixed: Chat account settings did not always save as expected\n  * fixed: RSS feed subscriptions sometimes lost\n  * fixed: Calendar: A parsing error for alarm triggers of type\n    'DURATION' caused sync problems for some users\n  * fixed: Various security fixes\n\nMFSA 2021-30 (bsc#1188275)\n\n* CVE-2021-29969: IMAP server responses sent by a MITM prior to STARTTLS could be processed\n* CVE-2021-29970: Use-after-free in accessibility features of a document\n* CVE-2021-30547: Out of bounds write in ANGLE\n* CVE-2021-29976: Memory safety bugs fixed in Thunderbird 78.12\n\nThis update was imported from the SUSE:SLE-15-SP2:Update update project.","status":"published","published":"2021-08-04T00:14:42Z","modified":"2026-02-04T02:30:29.901538Z","updated_at":"2026-11-02T16:58:31.879684Z"},{"id":"openSUSE-SU-2021:2458-1","title":"Security update for MozillaThunderbird","description":"This update for MozillaThunderbird fixes the following issues:\n\nMozilla Thunderbird 78.12\n\n  * fixed: Sending an email containing HTML links with spaces in\n    the URL sometimes resulted in broken links\n  * fixed: Folder Pane display theme fixes for macOS\n  * fixed: Chat account settings did not always save as expected\n  * fixed: RSS feed subscriptions sometimes lost\n  * fixed: Calendar: A parsing error for alarm triggers of type\n    'DURATION' caused sync problems for some users\n  * fixed: Various security fixes\n\nMFSA 2021-30 (bsc#1188275)\n\n* CVE-2021-29969: IMAP server responses sent by a MITM prior to STARTTLS could be processed\n* CVE-2021-29970: Use-after-free in accessibility features of a document\n* CVE-2021-30547: Out of bounds write in ANGLE\n* CVE-2021-29976: Memory safety bugs fixed in Thunderbird 78.12\n","status":"published","published":"2021-07-22T16:08:52Z","modified":"2026-02-04T02:18:52.581629Z","updated_at":"2026-11-02T16:58:32.266854Z"},{"id":"openSUSE-SU-2024:10601-1","title":"MozillaThunderbird-91.1.1-1.1 on GA media","description":"These are all security issues fixed in the MozillaThunderbird-91.1.1-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2025-05-07T18:08:23.188336Z","updated_at":"2026-11-02T16:58:34.487567Z"},{"id":"SUSE-SU-2021:2458-1","title":"Security update for MozillaThunderbird","description":"This update for MozillaThunderbird fixes the following issues:\n\nMozilla Thunderbird 78.12\n\n  * fixed: Sending an email containing HTML links with spaces in\n    the URL sometimes resulted in broken links\n  * fixed: Folder Pane display theme fixes for macOS\n  * fixed: Chat account settings did not always save as expected\n  * fixed: RSS feed subscriptions sometimes lost\n  * fixed: Calendar: A parsing error for alarm triggers of type\n    'DURATION' caused sync problems for some users\n  * fixed: Various security fixes\n\nMFSA 2021-30 (bsc#1188275)\n\n* CVE-2021-29969: IMAP server responses sent by a MITM prior to STARTTLS could be processed\n* CVE-2021-29970: Use-after-free in accessibility features of a document\n* CVE-2021-30547: Out of bounds write in ANGLE\n* CVE-2021-29976: Memory safety bugs fixed in Thunderbird 78.12\n","status":"published","published":"2021-07-22T16:08:51Z","modified":"2026-02-04T03:49:09.139091Z","updated_at":"2026-11-02T15:53:49.605187Z"},{"id":"USN-5058-1","title":"thunderbird vulnerabilities","description":"It was discovered that Thunderbird didn't ignore IMAP server responses\nprior to completion of the STARTTLS handshake. A person-in-the-middle\ncould potentially exploit this to trick Thunderbird into showing incorrect\ninformation. (CVE-2021-29969)\n\nMultiple security issues were discovered in Thunderbird. If a user were\ntricked into opening a specially crafted website in a browsing context, an\nattacker could potentially exploit these to cause a denial of service, or\nexecute arbitrary code. (CVE-2021-29970, CVE-2021-29976, CVE-2021-29980,\nCVE-2021-29984, CVE-2021-29985, CVE-2021-29986, CVE-2021-29988,\nCVE-2021-29989, CVE-2021-30547)\n","status":"published","published":"2021-08-31T12:15:03Z","modified":"2026-04-22T10:17:26.84409Z","updated_at":"2026-11-02T16:58:15.683829Z"}]}}